Stability of detrital heavy minerals in Tertiary sandstones from the North Sea basin

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Authors:Morton, A. C.
Author Affiliations:Primary:
Br. Geol. Surv., Keyworth, United Kingdom
Other:
Univ. London, Queen Mary Coll., Dep. Geol. Sci., United Kingdom
Volume Title:Patterns of mineral diagenesis on the NW European continental shelf and their relations to facies and hydrocarbon accumulation
Volume Authors:Morgan, D. J., editor; Rawson, P. F.
Source:Clay Minerals, 19(3), p.287-308; Joint meeting of the Clay Minerals Group of the Mineralogical Society and the Petroleum Exploration Society of Great Britain ; Patterns of mineral diagenesis on the NW European continental shelf and their relations to facies and hydrocarbon accumulation, Cambridge, United Kingdom, April 7-8, 1984, edited by D. J. Morgan and P. F. Rawson. Publisher: Mineralogical Society, London, United Kingdom. ISSN: 0009-8558
Publication Date:1984
Note:In English. 38 refs.; illus. incl. 5 tables, sketch maps
Summary:Intrastratal solution of detrital heavy minerals in North Sea Tertiary sandstones takes place in two different diagenetic settings, deep burial and acidic weathering. These are characterized by different orders of mineral stability: apatite, chloritoid, garnet, sphene and spinel are less stable in acidic weathering than in deep burial, whereas the reverse is true for andalusite, kyanite and sillimanite. Heavy-mineral dissolution patterns, therefore, do not follow one single order of stability but several, depending on the diagenetic environment in which the dissolution occurs. It seems from this that the relative order of stability for detrital heavy minerals is controlled by the chemistry of the interstitial waters, whereas the limits of persistence depend on pore-fluid temperature, rate of water throughput, and geological age. Because different diagenetic environments lead to differing orders of mineral stability, it may prove possible to elucidate certain aspects of the diagenetic history of a sandstone by heavy-mineral dissolution patterns. [D.J.M.]
Subjects:Burial metamorphism; Cenozoic; Clastic rocks; Detrital deposits; Diagenesis; Geochemistry; Heavy minerals; Materials; Metamorphism; Patterns; Pore water; Processes; Sandstone; Sedimentary petrology; Sedimentary rocks; SEM data; Solution; Temperature; Tertiary; Weathering; Atlantic Ocean; North Atlantic; North Sea; Environment
Abstract Numbers:85M/2020
Record ID:1985033733
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
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